London's Olympic venues seen from the sky

An aerial view, taken with a fisheye lens, shows the Olympic Park in London, March 27, 2012. London will host this summer's Olympic Games. REUTERS/Stefan Wermuth

An aerial view shows the Aquatics Centre, site of the swimming events, at the Olympic Park in London March 27, 2012. London will host this summer's Olympic Games. Picture taken March 27, 2012. REUTERS/Stefan Wermuth

An aerial view shows the Riverbank Arena, site of the hockey and paralympic football events, at the Olympic Park in London March 27, 2012. London will host this summer's Olympic Games. Picture taken March 27, 2012. REUTERS/Stefan Wermuth

An aerial view shows the Velodrome, site of the cycling events, at the Olympic Park in London March 27, 2012. London will host this summer's Olympic Games. Picture taken March 27, 2012. REUTERS/Stefan Wermuth

An aerial view shows the North Greenwich Arena, site of the artistic gymnastics, basketball, trampoline and wheelchair basketball events, in London, March 27, 2012. London will host this summer's Olympic Games. Picture taken March 27, 2012. REUTERS/Stefan Wermuth

The gated Bow Quarter apartment complex is seen at top right near the Olympic stadium in London in a March 27, 2012 file photo. Britain's military has told residents of the upscale apartment development near the Olympic Park in east London it is installing a missile battery on top of a tower within their housing complex to defend the 2012 Games this summer. REUTERS/Stefan Wermuth

An aerial view shows a section of the Olympic Park in London, March 27, 2012. London will host this summer's Olympic Games. REUTERS/Stefan Wermuth

An aerial view shows people sitting in Greenwich Park in London, March 27, 2012. London will host this summer's Olympic Games. REUTERS/Stefan Wermuth

An aerial view shows a bus crossing a bridge in London, March 27, 2012. London will host this summer's Olympic Games. REUTERS/Stefan Wermuth

An aerial view shows a section of the Olympic Park in London, March 27, 2012. London will host this summer's Olympic Games. REUTERS/Stefan Wermuth

An aerial view shows the North Greenwich Arena with Canary Wharf in the background in London, March 27, 2012. London will host this summer's Olympic Games. REUTERS/Stefan Wermuth

An aerial view shows a cemetery in London, March 27, 2012. London will host this summer's Olympic Games. REUTERS/Stefan Wermuth

The London skyline is pictured, March 27, 2012. London will host this summer's Olympic Games. REUTERS/Stefan Wermuth

An aerial view shows the London Eye in London, March 27, 2012. London will host this summer's Olympic Games. REUTERS/Stefan Wermuth

An aerial view shows the Olympic Stadium, site of the athletics and opening and closing ceremonies, with Canary Wharf in the background, in London, March 27. 2012. London will host this summer's 2012 Olympic Games. REUTERS/Stefan Wermuth